A rare case of Wilms Tumor in the right atrium.
Improvement in outcome of Malignant solid tumor cases is credited to existence of well-defined guidelines and protocols and integrated treatment modalities involving chemotherapy, surgery and radiotherapy. The present case describes a rare case of Wilms tumor extending from the left kidney to left renal vein and then via inferior vena cava into the right atrium. This patients was 5 years of age and resident of Karachi presented to the outdoor of National Institute of Child Health (NICH) with the complaints of progressively increasing abdominal distension over the last two months that exacerbated with the agony of swelling in both lower limbs. On physical examination, a mass was palpable in the left abdominal area not crossing the midline. On initial scrutiny with haematological testing and the basic radiology workup in the form of ultrasound abdomen, the patient was found to have a mass originating in the left kidney and invading the left renal vein. CT scan abdomen with contrast revealed that the patient had a heterogeneously enhancing mass of 12 X 9 cm originating from the left kidney and invading the left renal vein. The size of the tumor encroaching into the right atrium cavity was 19.5 X 20.5 mm.